I’ve been searching for a while trying to find a plugin that allows me to make custom villagers as shopkeepers, an example plugin would be this bukkit plugin: https://dev.bukkit.org/projects/shopkeepers
I think that its not just me that would want this but many more and it would be quite helpfull in my opinion.
@DosMike developed this plugin
But it’s not finished.
Shops do not work yet because the Invetory API is not implemented afaik.
its been there since 9th of july and no progress, i checked up on it months ago aswell lol i did not see much change since then
Sorry guys - I’m busy with life
I did not forget about Villager Shops 
I might get back to it in a few weeks